Method for determining reliability index associated with rolling stock movement trajectory of object

FIELD: physics, navigation.

SUBSTANCE: invention relates to radio engineering and can be used in navigation systems. For this purpose, the moving object position is estimated based on the reception of GNSS navigation signals transmitted by the satellite constellation; the navigational signals are modulated by means of a code, and the receiver comprises a local code duplicate. To determine the reliability index, the speed of of the receiver motion at the identified trajectory segment is estimated; on the basis of it, the Doppler delay function corresponding the receiver motion is derived; the autocorrelation function of the navigation GNSS signal received from each satellite of the constellation uis corrected using the delay function; the corrected autocorrelation function is compared with the theoretical autocorrelation function, using a quadratic criterion relevant to the reliability index.

EFFECT: invention provides increased accuracy in determining the reliability index in navigation systems.

5 cl, 6 dwg

 



 

Same patents:

FIELD: aircraft engineering.

SUBSTANCE: coordinates of a signal source are assessed and compared with the ground control complex coordinates stored in onboard memory. In case of good coincidence of coordinates the decision on legitimacy of a signal source is made. And in case of deviation of coordinates the commends received from an illegitimate signal source are blocked. therefore, the problem of protection of the command line of the spacecraft and, in particular, an exception of unauthorised access of illegitimate users to command-and-measurement system of the spacecraft is solved.

EFFECT: possibility of blocking of commands received from a illegitimate user including the protection against unauthorised intervention in operation of command-and-measurement system of a spacecraft.

1 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication engineering and can be used in satellite communication systems. An apparatus (1) for distributing/receiving satellite signals includes a reflector (3), suitable for receiving and distributing radio signals, a distributing/receiving unit (2) which includes LNB (4), suitable for converting radio signals into electrical signals in a first frequency band, focused by the reflector (3), amplifying the electrical signals in the first frequency band and reducing the first frequency band to a first intermediate frequency band. The distributing/receiving unit (2) also includes a radiator (TX), suitable for amplifying electrical signals in a second intermediate frequency band having no common frequencies with the first intermediate frequency band, increasing the second intermediate frequency band to a second frequency band (S), converting the electrical signals in the second frequency band into radio signals and transmitting said radio signals to the reflector (3). The apparatus (1) also includes a housing (21), which includes a modulator (25) suitable for modulating electrical signals in the second intermediate frequency band, an output (32) suitable for transmitting electrical signals in the first intermediate frequency band to a decoder (31), and a coaxial cable (20) connecting the unit (2) and the housing (21).

EFFECT: improved noise-immunity of the system.

18 cl, 1 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to space engineering and can be used for persistent tele- and radio communication with areas on Earth located outside the visibility zone of one satellite using a communication system consisting of two unified geostationary satellites. Slave satellites are fitted with radio navigation equipment and a navigation and motion control system; inter-satellite communication is augmented with two-way maintenance links; the slave satellites are located in the visibility zones of addressed ground communication stations which are inaccessible for the master satellite; control of the slave satellites and monitoring of the technical state thereof is carried out through the master satellite which is constantly located in the visibility zone of at least one ground command and tracking station and a ground communication station - antipodes of the addressed ground communication stations.

EFFECT: creating a space communication system with geographic antipode members, located in different arbitrary hemispheres from each other.

1 dwg

FIELD: radio engineering, communication.

SUBSTANCE: present invention relates to a method of eliminating interference in a telecommunication network, comprising a multi-beam satellite, a coverage area made up of a plurality of cells in which terminals are located, at least two of said cells, referred to as the first and second cell, being associated with the same frequency band, a first earth station consisting of a first demodulator capable of demodulating signals transmitted by terminals located in the first cell and a second earth station consisting of a second demodulator different from the first demodulator capable of demodulating signals transmitted by terminals located in the second cell. The method advantageously uses information supplied by the terminal, particularly its position and transmission parameters, and enables to establish the corresponding G/T value. This information is then transmitted to the demodulator of the second earth station and will be used to reconstruct the signal incorporating the message and remove it from the received signal.

EFFECT: eliminating interference.

9 cl, 4 dwg

FIELD: physics, communication.

SUBSTANCE: invention relates to communications equipment and may be used in a communication system for an aircraft. A transceiving device (22) comprises at least one transmitter (24), at least one receiver (26, 28) and at least one antenna with at least one data processing device (12), connected with the transceiving device (22) by means of a data transmission device (20), and connected to the data processing device (12) by a control device (14), having manually operated switches, keys and/or handles (18) of adjustment, for input of data into at least one data processing device (12). A control device (14) is connected to one data processing device (12) mechanically into a single structural unit (16).

EFFECT: technical result consists in provision of communication facilities for an aircraft.

11 cl, 4 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to a communication system using telecommunication networks to set up radio-frequency connections between one main ground station, connected to a network control centre, and ground terminals through a multipoint communication satellite, and is intended to reduce crosstalk. The invention discloses a telecommunication network (100), which consists of a coverage area, which consists of multiple cells in which terminals (106) are located, wherein each cell is fixed at least behind one spot beam of the satellite to which the frequency band is allocated. The network control centre (105) comprises means of determining transmission parameters (108), characteristic for coordinates of the terminals in the coverage area, known as optimisation means, wherein the parameters cover the entire coverage area and means of transmitting all parameters (107, LMA, LDA) to each of the said ground terminals (106). Each terminal (106) comprises means of storing (112) at least a part of all the parameters, means of determining own geographic coordinates (113) in the coverage area and means of determining transmission parameters (114) for use based on parameters and geographic coordinates.

EFFECT: improved communication.

19 cl, 5 dwg

Compensation device // 2538784

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication engineering and can be used in satellite communication systems. The technical result is faster transmission of information owing to compensation for change in group delay. To this end, the system comprises a means of determining at least one of: phase deviation for a frequency channel from a plurality of frequency channels demultiplexed from a carrier for compensating for change in group delay in the carrier and gain deviation for the frequency channel for compensating for change in gain with the carrier; and a means of applying the determined at least one of: phase deviation and gain deviation in the frequency channel to restore the carrier from said plurality of frequency channels.

EFFECT: invention enables digital compensation for any undesirable change in group delay and gain, caused, for example, by analogue components such as filters in a satellite communication system.

8 cl, 10 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to satellite telecommunications. A superhigh frequency channel multiplexing device contains multiple elementary filters, connected in parallel to the common output via a transverse waveguide. The lower end of each filter is fixed to the base, common for all the filters. The upper end of each filter lies opposite to the base. Each filter also contains an outer side wall, at least one intracavity, defining an internal channel, a signal input, connected to the intracavity, and a signal output, connected to the transverse waveguide. The multiplexing device also contains a conducting radiating device, which is thermally and mechanically connected to at least two filters. The said conducting radiating device also contains at least one thermal plane and is connected to the outer side walls of at least two filters. The plane is fixed at a level of the filters upper ends.

EFFECT: decrease of the heat transfer rate at the channel section surface, operating in an out-of-band mode.

13 cl, 13 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to radio communication, particularly to a device for calibrating a multibeam satellite system, and is intended to facilitate calibration at any frequency within the bandwidth of the satellite system. The device includes a beam-forming circuit which provides a plurality of signal paths, wherein the device includes a calibration processor for determining phase and amplitude shifts of a test path of the plurality of signal paths through correlation of a calibration tone extracted from the test path with a reference calibration signal, wherein the calibration processor is configured to determine phase and amplitude shifts of the test path for at least two calibration tones of at least two different frequencies. The device also includes a means of applying an adjustment based on the determined phase and amplitude shifts to the test path in the beam-forming circuit. Two calibration tones of at least two different frequencies can be calibration tones input at two different frequencies and calibration tones converted at two different frequencies by the beam-forming circuit.

EFFECT: invention enables to calculate phase and amplitude shifts for each path through a beam-forming circuit for any frequency in the bandwidth of a multibeam satellite system and adjustments applied for formation or processing of required downlink or uplink beams of a multibeam satellite system.

23 cl, 11 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to a satellite communication system. A fixed transceiver system includes a first antenna designed to be positioned outside the area of non-visibility of the satellite and a second antenna connected to the first antenna and designed to be positioned in the area of non-visibility of the satellite. The fixed system is configured to receive through the first antenna downlink signals transmitted by the satellite on one downlink carrier frequency and to transmit the received downlink signals on one downlink carrier frequency in the area of non-visibility of the satellite through the second antenna. The mobile system is designed to be installed on a vehicle, includes a third antenna and a fourth antenna, and is configured to receive through the third antenna the downlink signals transmitted by the fixed transceiver system on one downlink carrier frequency, to receive through the fourth antenna the downlink signals transmitted by the satellite on one downlink carrier frequency, to determine whether the vehicle is in the area of non-visibility of the satellite or in an area of visibility of the satellite, and to transmit uplink signals on one uplink carrier frequency through the third antenna if the vehicle is in the area of non-visibility of the satellite or through the fourth antenna if the vehicle is in the area of visibility of the satellite. The fixed system is further configured to receive through the second antenna the uplink signals transmitted by the mobile transceiver system on one uplink carrier frequency and to transmit the received uplink signals to the satellite on one uplink carrier frequency through the first antenna.

EFFECT: extending communication between a vehicle and a satellite in the area of non-visibility of the satellite.

16 cl, 10 dwg

FIELD: physics, navigation.

SUBSTANCE: invention relates to satellite navigation and can be used in navigation equipment of GLONASS and GPS global satellite navigation system signal users, including equipment installed on-board spacecraft. The receiver includes a built-in system for monitoring the performance of the receiving-amplifier circuit and calibrating group time delay in receiving circuits of GLONASS and GPS navigation signals. The structure of the simulation circuit is changed by introducing a frequency synthesizer and broadband high-speed digital-to-analogue conversion, which enable to generate simulation signals simultaneously for two analogue signal processing circuits. Heterodyne frequency switches and a mixer are excluded.

EFFECT: simple design of the receiver of the equipment of global satellite navigation system signal users and faster monitoring of the performance thereof.

1 dwg

FIELD: physics, navigation.

SUBSTANCE: invention relates to satellite navigation and can be used in testing and inspecting consumer navigation equipment of satellite navigation systems, located in closed or shielded space. The technical result is creating a spatial navigation field in a closed space, shielded from the external environment, which corresponds to the real environment in which the consumer navigation equipment is to be used. The device which carries out said method using a multichannel satellite navigation system signal simulator with spaced-apart signal emitters enables to create a navigation field using spaced-apart navigation signal sources. When the antenna of the consumer navigation equipment being tested moves, amplitude/phase ratios will vary according to the displacement vector.

EFFECT: disclosed method enables to test interference-tolerant navigation receivers equipped with an antenna array which enables to change the antenna directional pattern for radiation coming from certain directions.

3 cl, 2 dwg

FIELD: radio engineering, communication.

SUBSTANCE: method involves determining coordinates of consumers navigation information with an M-channel receiving device, which receives navigation radio signals from S satellites of satellite navigation systems; forming a spatial array of the expected coordinates of the object of consumers of navigation information and measuring, in the receiving device, relative velocities between the phase centre of the antenna of the receiving device and coordinates of each of the S satellites of the satellite navigation systems using measured Doppler frequency shifts, from which normalised values of relative velocities or accelerations are obtained and normalised calculated values of relative velocities or accelerations between expected positions of coordinates of the receiving device located in the nodes of the spatial array and each of the S satellites of the satellite navigation systems are subtracted, wherein coordinates of consumers of navigation information are determined iteratively by searching for a global minimum of the mean-square deviation of the difference in measured and calculated values in nodes of the formed spatial array and reducing the size of said spatial array at each iteration.

EFFECT: high accuracy of real-time global location of consumers when the navigation equipment of the consumer is operating in offline mode.

3 dwg, 1 tbl

FIELD: radio engineering, communication.

SUBSTANCE: geometric filter is applied to a set of data of a GNSS signal with usage of a geometric combination of carrier phases to produce an array of estimates of ambiguity for geometric combination of carrier phases and the appropriate statistic information. A bank of ionospheric filters is applied to a set of data of a GNSS signal with usage of an ionospheric combination of carrier phases that does not depend on geometry to produce an array of estimates of ambiguity for the ionospheric combination of carrier phases and the appropriate statistic information. At least one code filter is applied to a set of data of a GNSS signal with usage of a totality of combinations of carrier codes, which do not depend on geometry and do not depend on ionosphere, to produce the array of estimates of ambiguity for combinations of carrier codes and the appropriate statistic information. The produced arrays are combined to produce a combined array of ambiguity estimates for all observations of the carrier phase and the appropriate statistic information.

EFFECT: increased speed of determination of ambiguity of GNSS signals.

20 cl, 40 dwg

FIELD: radio engineering, communication.

SUBSTANCE: system has a measurement module having a GLONASS/GPS navigation antenna, a GLONASS/GPS navigation receiver, a controller with nonvolatile memory, a transceiving communication module, an accumulator battery, an accumulator battery charging device, sensor equipment for the measurement module, external sensor equipment, a personal computer-based automated operator workstation with a processor.

EFFECT: high accuracy of calculating characteristics of displacements of engineering structures and continuous monitoring of parameters of displacements of engineering structures.

2 dwg

FIELD: radio engineering, communication.

SUBSTANCE: initial location estimate is found first and measurements are taken for a terminal. The initial location estimate is then corrected using the measurements in order to obtain a correct location estimate for the terminal. Correction is carried out by deriving a measurement vector based on the initial location estimate and measurements, forming an observation matrix for measurements, determining a weighting matrix, deriving a correction vector based on the measurement vector, the observation matrix and weighting matrix and correcting the initial location estimate using the correction vector.

EFFECT: high accuracy of estimating location of a wireless terminal.

40 cl, 13 dwg, 1 tbl

FIELD: radio engineering, communication.

SUBSTANCE: signal is detected using receiving devices such as wireless position finding devices which search for signals from any source, for example, satellite moving objects and base stations. Data can be acquired from previously detected data based on estimation of changes in parameters, such as time and location, which can compromise reliability. In some cases data can be corrected by changes in parameters. Corrected data can be calculated by a receiving device using incomplete measurements of sets of signals, especially if data for assisting detection provided by a remote object include more differing parameters than those usually provided. The new data do not necessarily have to be obtained until reliability of previous data falls as a result of constraints on time extrapolation using Doppler coefficients if there is no detection of movement of a mobile station which cannot be corrected, which compromises reliability of previous data.

EFFECT: high reliability of detected data.

35 cl, 4 dwg

FIELD: radio engineering, communications.

SUBSTANCE: invention relates to complex range radiotechnical systems (RRTS) of short-range navigation (SRN). RRTS of SRN of aircrafts (AC) comprises a requester and a responder. The requester comprises a generator of request pulses, a transmitter of the requester with a transmitting antenna of the requester at the outlet and a receiver of the requester with a receiving antenna of the requester at the inlet. The outlet of the requester receiver is connected to the first inlet of a metre of time intervals, the second inlet of which is connected with the first outlet of the generator of request pulses, the second outlet of which is connected with the inlet of the transmitter. The outlet of the metre of time intervals is connected to inlets of a range recorder and a board digital computing machine (BDCM) of navigation instrumentation (NI). The responder comprises a receiver of the responder with a receiving antenna of the responder at the inlet, a generator of a response and a transmitter of the responder with a transmitting antenna of the responder at the outlet, the outlet of the responder receiver is connected to the inlet of the response generator. Additionally the requester comprises a satellite reception metre of the requester with the antenna at the first inlet, a decoder of coordinate information of the responder and a device of coordinate information processing, and the responder comprises a satellite reception metre of the responder with the antenna at the inlet, a coder of coordinate information of the responder and a switching device. The outlet of the requester receiver is simultaneously connected to the inlet of the decoder of coordinate information of the responder, the first outlet of which is connected to the second inlet of the satellite reception metre of the requester, the second outlet of the specified decoder is connected to the inlet of data on coordinates of the responder in the NI BDCM and to the first inlet of the coordinate information processing device, the second inlet of which is connected to the outlet of the satellite reception metre of the requester, at the same time the outlet of the specified processing device is connected to the inlet of data on relative coordinates of an AC in the NI BDCM. In the responder the outlet of the response generator is connected with the first inlet of the switching device, the second and third inlets of which are connected, accordingly, with the first and second outlets of the coder of responder coordinate information, and the inlet of the responder is connected to the outlet of the satellite reception metre of the responder, and the outlet of the switching device is connected with the inlet of the responder transmitter. Versions of RRTS that implement increase of flight safety through provision of air environment observance at the requester and the responder are proposed.

EFFECT: improved accuracy of AC location detection.

5 cl, 5 dwg, 3 app

FIELD: information technology.

SUBSTANCE: system for determining coordinates of a mobile object in closed rooms has radiofrequency identifiers 1.i (i=1, 2, …, n), a reader 2, a transmitting wireless modem 3, a receiving wireless modem 5, a computer 4, wherein the reader 2 has a master generator 6, a circulator 7, a high frequency amplifier 9 and a phase detector 10; the transmitting wireless modem has a delay line 11, a pseudorandom sequence generator 12, an adder 13, a regenerative divider 14, a phase-shift modulator 16, a power amplifier 17; the receiving modem 5 has a high frequency amplifier 24, a phase doubler 25, first 26 and second 28 narrow-band filters, a phase halver 27 and a phase detector 29.

EFFECT: high accuracy and reliability of determining coordinates of mobile objects in closed rooms through complete frequency isolation between radiofrequency identifiers and wireless modems.

2 cl, 5 dwg

FIELD: physics.

SUBSTANCE: invention relates to methods for trilateration using communication line forecasting within line of sight (LOS) and route filtering within LOS. The disclosed trilateration method involves receiving a signal on each of a plurality of LOS routes and predicting efficiency of each of the LOS routes, filtering the signals received on the LOS routes, with efficiency lower than a given threshold value. The disclosed method can further involve performing trilateration using unfiltered signals to essentially determine the location of the communication device.

EFFECT: high accuracy of locating a communication device.

34 cl, 6 dwg

FIELD: the invention refers to radio technique means of determination of a direction, location, measuring of distance and speed with using of spaced antennas and measuring of a phase shift or time lag of taking from them signals.

SUBSTANCE: the proposed mode of determination of coordinates of an unknown transmitter is based on the transmitter's emitting of a tracing signal to the satellite, on receiving of signals of an unknown transmitter and legimite transmitters which coordinates are known, on forming a file of clusters, on selection of the best clusters out of which virtual bases are formed for calculating coordinates of legimite and unknown transmitters according to the coordinates of legimite transmitters and the results of calculation of their coordinates one can calculate mistakes of measuring which are taken into account at calculating the coordinates of the unknown transmitter.

EFFECT: increases accuracy of determination of coordinates of an unknown transmitter in the system of a satellite communication with a relay station on a geostationary satellite.

2 dwg, 1 tbl

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